import java.util.*;
public class HatePrenum{
	public static void main(String... args){
		Scanner scan = new Scanner(System.in);
		HatePrenum hate = new HatePrenum();
		int N = scan.nextInt();
		int K = scan.nextInt();
		int[] d = new int[N+1];
		int res=0;
			for(int i = 2; i <= N; i++){
				if(d[i] == 0){
					for(int j = 1; i*j<=N; j++){
						d[i*j]++;
					}
				}
			}
			for(int i = 2; i <= N; i++){
				if(d[i]>=K)res++;
			}
			System.out.println(res);
		}
}